<template>
  <div class="hello">
    <h1>{{ msg }}</h1>
    <p @click="change">我是传值按钮</p>
  </div>
</template>

<script>
export default {
  name: 'HelloWorld',
  props: ['msg'],
  data () {
    return {
      m: '我是子元素'
    }
  },
  methods: {
    change () {
      this.$emit('showParentComp', this.m)
    }
  }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="stylus">
h3
  margin 40px 0 0

ul
  list-style-type none
  padding 0

li
  display inline-block
  margin 0 10px

a
  color #42b983
</style>
